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- W4224014711 endingPage "2200615" @default.
- W4224014711 startingPage "2200615" @default.
- W4224014711 abstract "Li-ion batteries (LIBs) in electric vehicles (EVs) are usually operated intermittently and maintained at high states of charge (SoCs) for long periods. Because the internal particles of Ni-rich cathodes are easily exposed to the electrolyte at high SoCs owing to mechanical instability, the electrolyte exposure time—during which highly reactive Ni4+ ions react with the electrolyte—critically affects the degradation of the cathode. Here, 1 mol% B doping of a core–shell concentration gradient (CSG) Li[Ni0.88Co0.10Al0.02]O2 cathode (CSG-NCA88) is shown to dramatically alter the microstructure of the cathode and effectively protect the particle interior from parasitic electrolyte attack. The B-doped CSG-NCA88 cathode, CSG-NCAB87, maintains its original microstructure even after holding for 500 h in the fully charged state, whereas irreversible structural damage occurs in the pristine CSG-NCA88 cathode during the prolonged electrolyte exposure. The long-term cycling results confirm that the capacity retention of the cathodes is determined by the electrolyte exposure time at a high SoC and that microstructural modification can effectively suppress the time-dependent degradation from electrolyte attack. The proposed CSG-NCAB87 cathode can be utilized at full capacity without restricting the SoC, thus realizing the development of economical high-energy-density LIBs." @default.
- W4224014711 created "2022-04-19" @default.
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- W4224014711 date "2022-04-16" @default.
- W4224014711 modified "2023-10-16" @default.
- W4224014711 title "High‐Energy Ni‐Rich Cathode Materials for Long‐Range and Long‐Life Electric Vehicles" @default.
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- W4224014711 doi "https://doi.org/10.1002/aenm.202200615" @default.
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